I am often asked: Where do I get a good antenna? Or: Is this a good antenna? Unfortunately, you do not see if an antenna is good or bad before you do some measurements. Or you build one yourself. That is what we will do today. Be it for satellite reception, for LoRa, weather balloons, or even for Wi-Fi. Like that, we know what we have. And even can save some money.
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Links:
2.8" NanoVNA: https://www.tindie.com/products/hcxqs...
2.8" SMA NanoVNA V2: https://s.click.aliexpress.com/e/_A6Pm3F or https://s.click.aliexpress.com/e/_9zdUZ9
4" Type N NanoVNA V2: https://s.click.aliexpress.com/e/_AaJcaR
SMA connectors male: https://s.click.aliexpress.com/e/_A6CM7R
SMA connector female: https://s.click.aliexpress.com/e/_9xPlRx
Steel rods (easier to solder): https://ebay.us/qI9RU3
Semi-rigid cable: https://s.click.aliexpress.com/e/_AOzVM9
Simulation Software: https://hamsoft.ca/pages/mmana-gal.php
Ground-Plane Calculator: https://m0ukd.com/calculators/quarter...
J-Pole Calculator: https://m0ukd.com/calculators/slim-ji...
ARRL Antenna Handbook: https://amzn.to/2NhP4QL
Rothammel: https://amzn.to/3bQHRkI

Chapters:
00:00 Intro
00:41 Parts of an antenna
01:02 The Ground plane antenna
01:28 Impedance
01:45 Connectors
03:40 Building the ground plane antenna
04:48 Which wires and how long?
05:48 The build
07:04 What is a good antenna (including measurements)?
10:07 The antenna is finished
11:20 Far-field pattern and gain (incl. Simulation Software)
12:48 Other applications (Wi-Fi, satellites)
13:22 Conclusions
14:03 One last thing
14:30 Outro

The links above usually are affiliate links that support the channel (no additional cost for you).
Supporting Material and Blog Page: http://www.sensorsiot.org
Github: https://www.github.com/sensorsiot
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Discord:   / discord  
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